VALVE GROUP 2G8990 - Caterpillar

Storing Diesel Exhaust Fluid in high heat areas is not recommended. Do not store DEF in high heat generating areas on the machine, such as the pump compartment or the engine compartment. The quality of the DEF can degrade when exposed to high temperatures.
DEF fluid is stable when stored and handled properly. The quality of DEF rapidly degrades when stored at high temperatures. The ideal storage temperature for DEF is between −9° C (15.8° F) and 25° C (77° F). DEF that is stored above 35° C (95° F) for longer than 1 month must be tested before use. Testing should evaluate Urea Percentage, Alkalinity as NH3 and Biuret content.The length of storage of DEF is listed in the following table:
Table 6
Storage Temperature Expected DEF Life
Below 25° C (77° F) 18 months
25° C (77° F) to 30° C (86° F) 12 months
30° C (86° F) to 35° C (95° F) 6 months
Above 35° C (95° F) test quality before use Refer to "ISO 22241" document series for more information about DEF quality control.Note: Dispose of all fluids according to applicable regulations and mandates.Coolant Information
The information provided in this “Coolant Recommendation” section should be used with the “Lubricants Information” provided in the latest revision of Special Publication, SEBU6250, "Caterpillar Machine Fluids Recommendations". This manual may be found on the web at Safety.Cat.com.Due to the use of aluminum radiators, some coolant samples may show lower levels of nitrates or other ELC components as a result of the aluminum. Extra coolant additives may be required to aid with use in aluminum radiators. Consult your Cat dealer.The following two types of coolants may be used in Cat diesel engines:Preferred - Cat ELC (Extended Life Coolant)Acceptable - Cat DEAC (Diesel Engine Antifreeze/Coolant)
Never use water alone as a coolant. Water alone is corrosive at engine operating temperatures. In addition, water alone does not provide adequate protection against boiling or freezing.
Table 7
Recommendations for Finished Coolants for use in Cat engines
Coolant Type Recommendations Product Service hours (1)(2) Required Maintenance(3)
Cat ELC, Cat ELI, or commercial coolant that meets Cat EC-1 Preferred Cat ELC 12000 hours or 6 years Add Cat ELC Extender at 6000 service hours or one half of service life
Cat ELI (water based) (4) 12000 hours or 6 years Add Cat ELC Extender at 6000 service hours or one half of service life
Min requirements Cat EC-1 specification and "ASTM D6210" and
Organic Additive Technology (OAT) based on a combination of a monocarboxylic acid and a dicarboxylic acid.Free of phosphate, borate, and silicate.
Tolyltriazole: minimum typical concentration of 900 ppm
Nitrite: minimum typical concentration of 500 ppm in new coolants 6000 hours or 6 years Add Extender at 3000 service hours or one half of service life
Cat DEAC, Cat SCA, conventional coolants, and commercial extended life coolants that do not meet EC-1 Acceptable Cat DEAC 3000 hours or 3 years SCA at maintenance intervals
Cat SCA (water based) (4) 3000 hours or 2 years SCA at maintenance intervals
Min requirements for fully formulated Heavy-Duty Commercial coolants "ASTM D6210" and
Nitrite (as NO2)